[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.07.28"]
[Round "13"]
[White "Timman, Jan H"]
[Black "Langeweg, Kick"]
[Result "1-0"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 Nge7 7. Nge2 O-O 8. O-O f5 9. Nd5 Be6 10. Be3 Qd7 11. Qd2 Rf7 12. Rac1 Nd8 13. f4 Nc8 14. exf5 Bxf5 15. d4 Ne6 16. fxe5 dxe5 17. dxe5 Bxe5 18. Rcd1 Nd6 19. Qc1 Qa4 20. c5 Ne8 21. Ndc3 Qa6 22. b4 c6 23. b5 cxb5 24. g4 Bxg4 25. Rxf7 Kxf7 26. Rd7+ Kg8 27. Bxb7 Qa5 28. Bxa8 b4 29. Nd5 Bxe2 30. Ne7+ 1-0